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Viscusi ER, Martin G, Hartrick CT, Singla N, Manvelian G; EREM Study Group.Viscusi ER, et al.Anesthesiology. 2005 May;102(5):1014-22. doi: 10.1097/00000542-200505000-00022.Anesthesiology. 2005.PMID: 15851890Free article.Clinical Trial.